-tcfail006.hs:4:
+tcfail006.hs:5:
No instance for `Num Bool'
- arising from the literal `1' at tcfail006.hs:4
- In the right-hand side of a case alternative: (True, 1)
+ arising from the literal `1' at tcfail006.hs:5
+ in a group of case alternatives beginning: (1, True)